package collection;

import java.util.ArrayList;
import java.util.Collection;
/**
 *  集合中受equals 方法影响的操作
 */
public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,10));
        c.add(new Point(1,2));

        System.out.println(c);
        Point p = new Point(1,2);

        boolean contains = c.contains(p);
        System.out.println("集合中是否包含元素p" + contains);

        c.remove(p);
        System.out.println(c);

    }
}
